As unbiased as can be please? Help needed.

Started 3 months ago | Discussions thread
Jeff2013 Senior Member • Posts: 2,739
Re: As unbiased as can be please? Help needed.

Imho, DSLR - even the mighty D850 cannot keep up with mirrorless when it comes to using fast primes wide open. The AF just isn't as consistent or accurate until about f2.8, at which point you're into zoom territory anyway. The Samyang lenses have been discussed as problematic AF many times before though, so I would consider offloading it.

If you're going to be stopping down though, past f4 ish, then DSLR is generally going to perform better than most mirrorless. The A7III is not great with small aperture shooting.

I completely agree with this analysis.

I was first in line when D800E's were introduced and shot these and D810's for about six years. I mostly shoot fast primes, so I think I spent a short lifetime constantly calibrating these lenses to the several bodies that I would shoot. Worse, focus varied between shots at f1.4 (camera on a tripod shooting a LensCal target). I invited other photographers from my camera clubs with D810's to test with this setup and they all had the same problem, to varying degrees. I sent my D810's in to Nikon for repair and they were returned with the comment that they were within factory spec.

To make matters worse, I would need to estimate the distance to subject that I would be shooting at any engagement and calibrate for that distance.... which could change.

Shooting A7RIII's and an A9 completely solved the focus accuracy problem. I think the D850 is an incredible beast of a camera, and I salivate over the specifications, but for the way I shoot, it would likely be far too frustrating and I simply do not want to waste another minute of my life calibrating lenses to camera bodies.

As a note, I realize that the D850 has an internal calibration facility, but I understand that, in practice, it is not as useful as it sounds and it still does not compensate for the shot-to-shot variation, likely caused by the variation in mirror return position.

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 Jeff2013's gear list:Jeff2013's gear list
Sony RX1R II Sony a9 Sony a7R III Sony FE 55mm F1.8 Sony FE 90mm F2.8 macro +16 more
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